delete pics to save space

history_source/信息学奥赛一本通/2.8.8.cpp

@@ -0,0 +1,64 @@
+#include<iostream>
+using namespace std;
+bool Map[5][5];
+struct BFS
+{
+	int x,y,last;
+};
+bool che(int x,int y)
+{
+	if(x<0||x>4) return 0;
+	if(y<0||y>4) return 0;
+	return Map[x][y];
+}
+BFS bfs[30];
+int front=0,tail=0;
+void print(int n)
+{
+	if(n==-1) return;
+	print(bfs[n].last);
+	printf("(%d,%d)\n",bfs[n].y,bfs[n].x);
+}
+int main()
+{
+	int dx[4]={0,0,-1,1},
+		dy[4]={-1,1,0,0}; 
+	for(int i=0;i<5;i++)
+		for(int j=0;j<5;j++)
+		{
+			cin>>Map[j][i];
+			Map[j][i]=!Map[j][i];
+		}
+	bfs[tail].x=bfs[tail].y=0;
+	bfs[tail].last=-1;
+	tail++;
+	while(tail-front>0)
+	{
+		for(int i=0;i<4;i++)
+		{
+			if(che(bfs[front].x+dx[i],bfs[front].y+dy[i]))
+			{
+				Map[bfs[front].x+dx[i]][bfs[front].y+dy[i]]=0;
+				bfs[tail]=bfs[front];
+				bfs[tail].last=front;
+				bfs[tail].x+=dx[i];
+				bfs[tail].y+=dy[i];
+				if(bfs[tail].x==4&&bfs[tail].y==4) 
+				{
+					print(tail);
+					return 0;
+				}
+				tail++;
+			}
+		}
+		front++;
+	}
+	return 0;
+}
+/*
+0 1 0 0 0
+0 1 0 1 0
+0 0 0 0 0
+0 1 1 1 0
+0 0 0 1 0
+*/